I guess we've all seen those cardboard cut outs representing an electromagnetic wave, with the electric & magnetic fields at right angles to each other. We're told that a photon is a 'Packet' of electromagnetic energy, the thing I would like to know is...How many of these squiggles of waves go to make up a photon? Is it one wavelength? Does it depend on the wavelength? How does a photon of Gamma radiation differ from an infra red one? Presumably, a photon of Gamma radiation would be 'Shorter' than an infra red one? These electric & magnetic fields, are they thin & sharp as represented on the cardboard models? Or are they more of a general 'Splurge'. Any non technical simple to understand answers would be greatly appreciated.